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US 2,811,128 A
Filed
: 03/31/1955
Issued
: 10/29/1957
Est. Priority Date
: 03/31/1955
Status: Expired due to Term
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Current Assignee
George E. Franck
Original Assignee
George E. Franck
Inventors
Franck, George E.
Application Number
US03/498,165
Time in Patent Office
943 Days
Field of Search
US Class Current
116/276
CPC Class Codes
F16L 2101/30
Inspecting, measuring or te...
G01F 23/02
by gauge glasses or other a...
G01P 13/008
by using a window mounted i...
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